Mae S4C yn holi pobl ifanc 16-34 oed am eu harferion gwylio, eu hymddygiad ar-lein, ac am S4C.   
Dim ond tua 10 munud dylai'r arolwg gymryd - diolch am eich amser.

S4C is asking 16-34 year olds about their viewing habits and online behaviour, and about S4C.
This survey will only take about 10 minutes - thank you for your time.

Question Title

* 1. Ydych chi rhwng 16 a 34 oed?
Are you between 16 and 34 years of age?